Question
The lowest pressure attainable using the best available vacuum techniques is about 10−12N/m210−12N/m2. a. At such...
The lowest pressure attainable using the best available vacuum techniques is about 10−12N/m210−12N/m2.
a.
At such a pressure, how many molecules are there per cm3cm3 at 16 ∘C∘C
Homework Answers
Answer #1
Assuming air to be an ideal gas.
Pressure 
Temperature 
We want to find number of molecules in 1cm3 of air.
Volume 
Using ideal gas equation
where 
There are 250 molecules in 1cm3 of air.
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